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PCF85263ATL/A Datasheet(PDF) 29 Page - NXP Semiconductors

Part # PCF85263ATL/A
Description  Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus
PDF  102 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF85263ATL/A Datasheet(HTML) 29 Page - NXP Semiconductors

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NXP Semiconductors
PCF85263A
Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus
The timestamp registers are read only and cannot be written. It is possible to set all three registers to 0 with the
CTS instruction in the Resets register (Section 7.15).
timer registers
RTC mode
seconds
minutes
:
years
stopwatch mode
seconds
minutes
:
999999 hours
timestamp
register
TSR1
timestamp
register
TSR2
timestamp
register
TSR3
TS pin
battery
switchover
mode
TSR1M[1:0]
mode
TSR2M[2:0]
mode
TSR3M[1:0]
flag
TSR1F
flag
TSR2F
flag
TSR3F
load
load
load
load
aaa-009595
Figure 17. Timestamp
The mode for each register is controlled by the TSR_mode register.
Bit
Symbol
Value
Description
Timestamp3 (TSR3)
timestamp register 3 mode
00 [1]
no timestamp
01
FB, record
First-time switch to Battery event
10
LB, record
Last-time switch to Battery event
7 to 6
TSR3M[1:0]
11
LV, record
Last-time switch to VDD event
5
-
0
not used
Table 19. TSR_mode - timestamp mode control register (address 23h) bit description
PCF85263A
All information provided in this document is subject to legal disclaimers.
© 2025 NXP B.V. All rights reserved.
Product data sheet
Rev. 5.4 — 12 December 2025
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